arch/riscv/mm/physaddr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <linux/types.h>
   4 #include <linux/mmdebug.h>
   5 #include <linux/mm.h>
   6 #include <asm/page.h>
   7 #include <asm/sections.h>
   8
   9 phys_addr_t __virt_to_phys(unsigned long x)
  10 {
  11         phys_addr_t y = x - PAGE_OFFSET;
  12
  13         /*
  14          * Boundary checking aginst the kernel linear mapping space.
  15          */
  16         WARN(y >= KERN_VIRT_SIZE,
  17              "virt_to_phys used for non-linear address: %pK (%pS)\n",
  18              (void *)x, (void *)x);
  19
  20         return __va_to_pa_nodebug(x);
  21 }
  22 EXPORT_SYMBOL(__virt_to_phys);
  23
  24 phys_addr_t __phys_addr_symbol(unsigned long x)
  25 {
  26         unsigned long kernel_start = kernel_map.virt_addr;
  27         unsigned long kernel_end = (unsigned long)_end;
  28
  29         /*
  30          * Boundary checking aginst the kernel image mapping.
  31          * __pa_symbol should only be used on kernel symbol addresses.
  32          */
  33         VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end);
  34
  35         return __va_to_pa_nodebug(x);
  36 }
  37 EXPORT_SYMBOL(__phys_addr_symbol);